From owner-freebsd-multimedia@FreeBSD.ORG Sun Apr 16 01:04:32 2006 Return-Path: X-Original-To: freebsd-multimedia@freebsd.org Delivered-To: freebsd-multimedia@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0D4CA16A401 for ; Sun, 16 Apr 2006 01:04:32 +0000 (UTC) (envelope-from vayu@sklinks.com) Received: from smtp114.sbc.mail.mud.yahoo.com (smtp114.sbc.mail.mud.yahoo.com [68.142.198.213]) by mx1.FreeBSD.org (Postfix) with SMTP id 9D42743D48 for ; Sun, 16 Apr 2006 01:04:31 +0000 (GMT) (envelope-from vayu@sklinks.com) Received: (qmail 97989 invoked from network); 16 Apr 2006 01:04:31 -0000 Received: from unknown (HELO akasha.akasha) (varuna@sbcglobal.net@69.107.4.129 with plain) by smtp114.sbc.mail.mud.yahoo.com with SMTP; 16 Apr 2006 01:04:30 -0000 From: Vayu To: freebsd-multimedia@freebsd.org Date: Sat, 15 Apr 2006 18:04:16 -0700 User-Agent: KMail/1.9.1 References: <26EC8B9F-9627-4447-B20F-BF5743CBAEB8@netmusician.org> <87716498-15A6-45D5-8FB2-1D4485C592A1@netmusician.org> In-Reply-To: <87716498-15A6-45D5-8FB2-1D4485C592A1@netmusician.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200604151804.16919.vayu@sklinks.com> Cc: Subject: Re: ffmpeg question X-BeenThere: freebsd-multimedia@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Multimedia discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 16 Apr 2006 01:04:32 -0000 On Friday 14 April 2006 23:11, Joe Auty wrote: > Got it! > > This bug is fixed in ffmpeg-devel... > > I think I'm good now. > > > I hope my thinking through this problem outloud on the list will be > of some use to some, and not simply spam. I'll try to be quiet now =) > Well if you're offering use to others I have two questions. What is /dev/cxm0, is it your video camera? What do you mean "fixed in ffmpeg-devel", do you mean you can compile a newer version? > On Apr 15, 2006, at 1:53 AM, Joe Auty wrote: > > > Okay, I think I figured this out.... almost: > > > > ffmpeg -i /dev/cxm0 -vcodec copy -acodec copy -t 20 test_ffmpeg.mpg > > > > > > Except doing this completely ignores my -t 20 and keeps on > > recording after 20 seconds... why is that? > > > > > > On Apr 15, 2006, at 1:14 AM, Joe Auty wrote: > > > >> > >> On Apr 15, 2006, at 1:10 AM, Jacob Meuser wrote: > >> > >>> On Fri, Apr 14, 2006 at 11:54:18PM -0400, Joe Auty wrote: > >>>> Hello, > >>>> > >>>> Doing a: > >>>> > >>>> cat /dev/cxm0 > myvideo.mpg > >>>> > >>>> produces great mpeg2 video... However: > >>>> > >>>> ffmpeg -i /dev/cxm0 -t 10 test_ffmpeg.mpg > >>>> > >>>> produces 10 seconds of mpeg1 video that doesn't look as good. > >>>> > >>>> > >>>> I've tried adding -f and -vcodec options with -s 640x480, > >>>> but I just can't seem to find something that will reproduce my raw > >>>> feed without errors, loss of picture, the size being off, or > >>>> reverting back to mpeg1. > >>>> > >>>> To save me a little further time in just random trial and error, > >>>> can > >>>> anybody hook me up with the combination I need? > >>> > >>> sorry, but what exactly are you trying to do? what is lacking with > >>> the cat command? > >>> > >>> most likely, if you are running a transcoder (like ffmpeg, mencoder > >>> or transcode), it is decoding the input into raw YUV or RGB and then > >>> back to MPEG. this is a lossy and time/cpu consuming process. > >>> > >> > >> The cat command works perfectly, but I'm trying to script it, and > >> since you can use ffmpeg to specify how many seconds of footage to > >> capture I'm trying to make this work. > >> > >> According to Quicktime's Get Info, the cat files are mpeg2... I'd > >> like to know the best way to preserve the same quality from the > >> cat command using ffmpeg. > >> > >> Am I starting to make sense now? > >> > >> > >> _______________________________________________ > >> freebsd-multimedia@freebsd.org mailing list > >> http://lists.freebsd.org/mailman/listinfo/freebsd-multimedia > >> To unsubscribe, send any mail to "freebsd-multimedia- > >> unsubscribe@freebsd.org" > > > > _______________________________________________ > freebsd-multimedia@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-multimedia > To unsubscribe, send any mail to "freebsd-multimedia-unsubscribe@freebsd.org" >